left-hand-side cylinder cases and
head were refinished. The carbure-
tor was also refinished on the out-
side and completely rebuilt on the
inside. Internally, all the bearings
and seals were replaced using OEM
Honda parts. Transmission parts
were polished and the cylinder ports
got cleaned up a little, but no major
grinding was performed. A Boyesen
Rad valve was added to improve per-
formance, and Moto Hose red silicone
hoses also provided upgrades. The
crank was rebuilt with a new rod and
then balanced by Crank Works.
With the engine rebuild done, it was
time to tackle the CR500AF’s major
fabrication. Mike at Edge Finder was
MARCH 2018 / DIRT BIKE 45
Lots of fabrication man-hours and a ton of bolt-on
products made this Honda build a success.
The IMS Core pegs offer a wider, more
aggressive platform than the stock units.